Peter Gallagher Sandy Cohen Actor Ben McKenzie Ryan Atwood Actor Kelly Rowan Kirsten Cohen Actor Adam Brody Seth Cohen Actor Mischa Barton Actor Tate Donovan Actor Chris Carmack Guest Star Brian McNamara Guest Star Nicholas Gonzalez Guest Star Navi Rawat Guest Star Alan Dale Actor Rachel Bilson Summer Roberts Actor Melinda Clarke Julie Cooper Actor Bruno Amato Guest Star Cynthia Avila Guest Star Robin Paul Guest Star Julie Skon Guest Star Tyler Bruhn Guest Star LynNita Ellis Guest Star Josh Schwartz Executive Producer McG Executive Producer Ian Toynton Director